Draw-bench



J. J. FISHER.

DRAW BENCH.

(No Model.)

' Patented June 30, 1885.

Aharney NITED STATES PATENT OFFICE.

JOHN J. FISHER, OF CLEVELAND, OHIO.

DRAW-BENCH.

SPECIFICATION forming part of Letters Patent No. 320,922, dated June 30,1885.

Application filed June 14, 1884.

T0 aZZ whom it may comcern:

Be it known that I, JOHN J. FIsHER, of Cleveland, county of Guyahoga,and State of Ohio, have invented a new and useful Improvement in DrawingTubes; and I do hereby declare that the following is a full, clear, andexact description of the same, reference being made to the accompanyingdrawings, and to letters of reference marked thereon.

My invention relates to certain new and useful improvements in themanufacture of metal tubing or piping, and has for its object theproviding of a set of three benches and drawchairs for makingbutt-welded pipe, either half-way with tongs or the whole way withbells, as may be required, thus doing away with the two-bench system nowin general use and increasing correspondingly the capacity of themachine, as each operation, instead of being conducted separately, isperformed in conjunction with another, so that more is accomplished in agiven length of time and with the same amount of labor. These objectsare attained by arranging two or more sets of draw frames or chairsbefore a furnace, instead of one, as is now done, and when the skelpsare drawn through the bells and forming-tubes from the furnace, insteadof being returned and drawn the second time through the same bell, theyare shifted to the adjoining chair for the second operation of drawing.At the same time a new one is being drawn through the bell just leftvacant by transfer of the first tube to the second chair, when both aredrawn simultaneously. The first is then removed toathird bench or chairfor the final operation, and thesecond takes its place, as before, a newone occupying the place of the second on the first bench, and so onindefinitely, whereby at least one-third more work is accomplished thanin the onebench system hitherto in general use.

In the drawings herewith, Figure 1 is a top view or plan of a couple ofdraw benches or chairs constructed in the ordinary manner and placedconveniently in front of a furnace for heating the skelps or blanks outof which the tubes are formed. Fig. 2 is a side elevation (No model.)

of the same; Fig. 3, an end view, and Fig. 4 is a die-holder to be used,if required, in place of the bell in Fig. 3. In addition to these, thereis a third bench similar to l and 2 for sizing and rounding the pipe toproper gage after welding. This is not shown, as'its construction isidentical with the others. Instead of a third bench, a set of rolls maybe used for rounding and sizing.

In the drawings, E is a stout frame or bench provided withfriction-rolls F E. On top of these rolls is a chain, D, armed withsuitable tongs or grip, c, for seizing and holding the skelp or pipe,the outer end being attached -to any suitable winding or drawing device.A is intended to represent the front of a suitable furnace for heatingthe skelps or blanks, from whence they are drawn out by the tongs a,passing on the way out through a funnelshaped bell, B, by which theskelps are rolled into tubes as they are drawn out by the agency ofchain D and tongs c. As stated above, after being drawn out on one benchthey are transferred to the other, where the drawing is completed, andthen transferred to a third bench to be sized and rounded.

Now, what is new in this operation is providing a second draw-bench tobe worked in conjunction with the first, substantially as stated,whereby the amount of work that may be accomplished by one set isgreatly enlarged over the methods heretofore in use.

I claim, therefore- An improvement in draw-benches for the manufactureof tubes, the two dies of unequal size placed side by side upon the samebench in front of the furnace, together with the tongs and chainsconnected therewith, in virtue of which two tubes may be drawn at thesame time, such tube being twice heated and twice drawn-first to weldand then to reduce-substantially as set forth.

This specification signed and witnessed this 18th day of May, 1883.

JOHN J. FISHER.

Witnesses:

GEO. O. TRACY, J AS. A. DOYLE.

